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2.MD.3 – Estimate lengths using units of inches, feet, centimeters, and meters.
Samples: Estimate length in inches. Estimate length in feet. What Is A Centimeter. Estimate length in meters.
You can go to an overview of all the curricula here.
3.GM.1 – Measure the lengths, areas, volumes or capacities, and weights of objects and the duration of events, using linear whole-number scales and applying basic addition facts to standard units
Samples: Telling the time on an analog clock - quarter to and past. Months of the Year. Reading a Calendar.